Questions:

In order to wake Doc up from his one shot of whiskey induced coma, the bartender poured "wake-up juice" down his throat. In reality, it was THIS Western style HANGOVER CURE consisting of a raw egg, Worcestershire sauce, hot sauce, salt and ground black pepper. The name comes from the raw egg feeling like a certain marine creature going down your throat.

The ravine the train crashes into at the end of the film was later named Eastwood Ravine. However, it had a different name at the start of the film when Marty mentions how students wished their teachers would meet the same fate as the original namesake. WHAT WAS THE ORIGINAL NAME OF THIS RAVINE?

BTTF II's Marty arrives ON THIS DATE in 1885 from 1955 (using the Delorean stored in a cave since 1885) after arriving back from 1985A and seeing himself head back to the real 1985 (if you need a moment to let that soak in, take one).

In order to make the train's boiler burn hotter, Doc Brown throws in this TYPE OF LOG. The name partly comes from the fact they are made from pressed sawdust mixed with coal dust or any other type of propellant. Doc, of course, added more chemicals to make them burn harder.

At the end of BTTF III, when Marty arrives back to the real 1985 and picks up Jennifer, he encounters [the answer to Q9 in the BTTF II quiz], who then forces a drag race. Marty instead throws his truck in reverse and avoids colliding with THIS MAKE OF CAR, thereby not creating Marty's 2015 as seen in BTTF II (and, according to some, assuring the Cubs will never win the World Series).

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Rolls Royce [As of this quiz's release, the Cubs are still in the hunt]

As Doc and Marty share their family history, we learn that Doc's grandparents arrived in 1908, had THIS LAST NAME and had to change it during WWI. It may explain Doc's scientific DNA (assuming he's in some way related to the most famous person to carry that last name).

What is THE MAIN SIGNIFICANCE of the day and time as seen in the deadlines for each quiz (even though an incorrect meme seems to pop up every now and then saying otherwise)? (Ignore the seconds) (edited at 4:31 pm, October 14, 2015 (EDT))

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The day and time Marty, Doc and Jennifer arrive in 2015. (We will accept clear knowledge equivalents as long as it mentions some sort of time travel and 2015. For good measure, we'll also take "Back to the Future Day.").